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United States Patent | 6,070,640 |
Miyagawa ,   et al. | June 6, 2000 |
A walk-through type fire-limiting screen arrangement separates an interior space of a building and prevents fire from propagating and assists refugees to escape from the fire. A non-combustible or fire-proof screen droops from a ceiling or a beam. At least one slit extends vertically down to a lower end of the screen to define a refugee path. A predetermined width of a closure flap is associated with the at least one slit for closing the slit with a predetermined overlap between the at least one slit and the closure flap. A main weight bar is horizontally fixed along the lower end of the screen except for the closure flap, and a sub-weight bar is horizontally fixed along the lower end of the closure flap.
Inventors: | Miyagawa; Yasuyuki (Saitama, JP); Muraoka; Kou (Tokyo, JP); Honma; Masahiko (Tokyo, JP); Miyake; Akira (Tokyo, JP) |
Assignee: | Obayashi Corporation (Osaka, JP) |
Appl. No.: | 945054 |
Filed: | October 22, 1997 |
PCT Filed: | February 17, 1997 |
PCT NO: | PCT/JP97/00419 |
371 Date: | October 22, 1997 |
102(e) Date: | October 22, 1997 |
PCT PUB.NO.: | WO97/35642 |
PCT PUB. Date: | October 2, 1997 |
Mar 26, 1996[JP] | 8-070561 | |
Jul 02, 1996[JP] | 8-172689 | |
Jul 02, 1996[JP] | 8-172690 | |
Jul 02, 1996[JP] | 8-172691 | |
Jul 30, 1996[JP] | 8-200079 |
Current U.S. Class: | 160/121.1; 160/25; 160/349.1 |
Intern'l Class: | E06B 009/08 |
Field of Search: | 160/121.1,120,25,237,238,116,181,180,184,332,349.1 169/48,49 |
2160118 | May., 1939 | Brent | 160/237. |
3136356 | Jun., 1964 | Mears | 160/237. |
3766958 | Oct., 1973 | Mitchell | 160/1. |
3872927 | Mar., 1975 | Stults | 160/6. |
3877525 | Apr., 1975 | Husson et al. | 160/1. |
3960216 | Jun., 1976 | Isobe | 160/1. |
4077474 | Mar., 1978 | Hattori | 160/1. |
4313485 | Feb., 1982 | Gidge et al. | 160/349. |
4316345 | Feb., 1982 | Rivette et al. | 160/180. |
5195594 | Mar., 1993 | Allen et al. | 160/243. |
5383510 | Jan., 1995 | Allen | 160/243. |
5450890 | Sep., 1995 | Pinkalla et al. | 160/121. |
5542463 | Aug., 1996 | Pinkalla et al. | 160/121. |